Bug ID 997761: Subsessionlist entries leak if there is no RADIUS accounting agent in policy

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP APM(all modules)

Known Affected Versions:
15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4,, 16.0.0,, 16.0.1,,

Fixed In:
16.1.0, 15.1.5

Opened: Feb 26, 2021

Severity: 3-Major


Subsessionlist entries are not cleaned up when subsessions are deleted. For long-lived main sessions, use cases such as API protection, the number of leaked subsessionlist entries increases over time, resulting in increasing memory consumption. If high availability (HA) is configured, the standby device can experience even more memory pressure when a very large number of subsessionlist entries are sent to it for mirroring.


TMM may run out of memory and restart. Traffic disrupted while tmm restarts.


This issue occurs if the main session is long-lived and there is no RADIUS accounting agent in the policy.



Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips